1. From the Departments of Nuclear Medicine (H-C.S., H-S.B.), Neurology (K.H.C., B.C.K.), and Diagnostic Radiology (J-J.S.), Chonnam National University Hospital, Gwangju, South Korea; Department of Nuclear Medicine (C-G.K.), Wonkwang University Hospital, Iksan, South Korea; and Department of Nuclear Medicine (D.J.Y., E.E.K.), University of Texas MD Anderson Cancer Center, Houston, Tex.